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option.go
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option.go
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// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2016-2019 Datadog, Inc.
package api
import (
"context"
"math"
)
type config struct {
serviceName string
ctx context.Context
analyticsRate float64
scopes []string
}
func newConfig(options ...Option) *config {
cfg := &config{
ctx: context.Background(),
// analyticsRate: globalconfig.AnalyticsRate(),
analyticsRate: math.NaN(),
}
for _, opt := range options {
opt(cfg)
}
return cfg
}
// An Option customizes the config.
type Option func(*config)
// WithContext sets the context in the config. This can be used to set span
// parents or pass a context through to the underlying client constructor.
func WithContext(ctx context.Context) Option {
return func(cfg *config) {
cfg.ctx = ctx
}
}
// WithScopes sets the scopes used to create the oauth2 config for Google APIs.
func WithScopes(scopes ...string) Option {
return func(cfg *config) {
cfg.scopes = scopes
}
}
// WithServiceName sets the service name in the config. The default service
// name is inferred from the API definitions based on the http request route.
func WithServiceName(serviceName string) Option {
return func(cfg *config) {
cfg.serviceName = serviceName
}
}
// WithAnalytics enables Trace Analytics for all started spans.
func WithAnalytics(on bool) Option {
return func(cfg *config) {
if on {
cfg.analyticsRate = 1.0
} else {
cfg.analyticsRate = math.NaN()
}
}
}
// WithAnalyticsRate sets the sampling rate for Trace Analytics events
// correlated to started spans.
func WithAnalyticsRate(rate float64) Option {
return func(cfg *config) {
if rate >= 0.0 && rate <= 1.0 {
cfg.analyticsRate = rate
} else {
cfg.analyticsRate = math.NaN()
}
}
}